1304243661 has 16 divisors (see below), whose sum is σ = 2035893888. Its totient is φ = 727104000.

The previous prime is 1304243609. The next prime is 1304243693. The reversal of 1304243661 is 1663424031.

It is not a de Polignac number, because 1304243661 - 2¹³ = 1304235469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304243761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756540 + ... + 758261.

It is an arithmetic number, because the mean of its divisors is an integer number (127243368).

Almost surely, 2^1304243661 is an apocalyptic number.

It is an amenable number.

1304243661 is a deficient number, since it is larger than the sum of its proper divisors (731650227).

1304243661 is a wasteful number, since it uses less digits than its factorization.

1304243661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514852.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1304243661 is about 36114.3137966098. The cubic root of 1304243661 is about 1092.5791576540.

Adding to 1304243661 its reverse (1663424031), we get a palindrome (2967667692).

The spelling of 1304243661 in words is "one billion, three hundred four million, two hundred forty-three thousand, six hundred sixty-one".